Dial retainer for calendar timepieces



April 1, 1952 M. HUGUENIN 2,590,967

DIAL RETAINER FOR CALENDAR TIMEPIECES Filed Feb, 21, 1951 f FIG 1- Ju Van l-or Ma rc H X ArforM 0 Patented Apr. 1, 1952 DIAL RETAINER FOR CALENDAR TIMEPIECES Marc Huguenin, Geneva, Switzerland, assignor to Montres R'olex S. A. (Rolex Watch Co. Ltd.), a corporation of Switzerland Application February 21, 1951, Serial No. 211,990 In Switzerland February 28, 1950 2 Claims.

This invention relates to a dial retainer for a calendar timepiece comprising a rotary dial carrying the indications of the calendar and situated underneath the ordinary fixed dial.

A feature of the invention is that the rotary dial is held at its periphery by a split ring mounted, by means of a groove, on the plate and that the fixed dial is provided with a tubular flange intended to fit tightly round the said ring in such a way as to prevent it from opening, this arrangement likewise ensuring the fixing of the fixed dial.

The accompanying drawings illustrate one embodiment of the invention by way of example.

Fig. l is a partial section of a timepiece, and

Fig. 2 is a plan view on a smaller scale, certain parts being broken away.

The timepiece illustrated comprises a plate I, a fixed dial 2 and an annular rotary dial 3 supported by a spring plate 4 fixed to a star wheel 5. The rotary dial 3 carries the indications of the days of the week Which appear through a window 6 cut in the dial 2.

The dial 3 is held in place, at its periphery, by a ring I split at 8 and mounted by means of a slot, at 9, on the plate I-. This ring is provided with an annular flange la extending above the rotary dial 3. The dial 2 is provided with a tubular flange 2a fitted into an annular notch It in the ring I and preventing the latter from opening. The ring 1, being very slightly opened by the plate I, is no longer strictly circular once it is in position over this plate, so that the flange 2a of the dial 1 exerts pressure on the ring I, whereby the fixing of this ring is ensured.

What I claim is:

1. In a calendar timepiece comprising a fixed dial and a rotary dial carrying the indications of the calendar and situated underneath the fixed dial, a base plate provided with an undercut peripheral groove, a split ring snapped into said groove and cooperating with said rotary dial for retaining it in place, said fixed dial having a depending tubular flange at its outer periphery fitting tightly over said ring so as to prevent it from opening, this arrangement also serving as a means for securing the fixed dial in place.

2. In a calendar timepiece comprising a fixed dial and a rotary dial carrying the indications of the calendar and situated underneath the fixed dial, a base plate provided with an undercut peripheral groove, a split ring snapped into said groove, said ring being provided with an inwardly extending annular flange at its inner periphery, said annular flange overlying the marginal portion of said rotary dial for retaining it in place, said fixed dial having a depending tubular flange at its outer periphery fitting tightly over said ring so as to prevent it from opening, this arrangement also serving as a means for securing the fixed dial in place.

MARC HUGUENIN.

No references cited. 

